Friction-clutch for drums of donkey-engines.



R. G. BRYANT.

FRICTION CLUTCH FOR DRUMS 0P DONKEY ENGINES.

' APPLIOATION FILED SEPT. 20, 1911.

Patented May 12, 1914 2 BHIJET8-BHEET 1.

III/I lllll INVENTOH M6. B/g W BY v WITNESSES:

7TOR/VEV R. O. BRYANT. FRICTION CLUTCH FOR DRUMS 0F DONKEY ENGINES.APPLICATION FILED SEPT. 20, 1911. 1 ,096,598. Patented May 12, 1914 2SHEETS-SHEET 2.

WIN/8858:

INVENTOR Raf/m2 595W BY I A TTORNEY COLUMBIA PLANOGRAPN c0.. WASHINGTON.n, c

U IT I sra'rns PA ROBERT C. BRYANT, 0F CLATSKANIE, OREGON.

FRICTION-CLUTCH FOR DRUMS OF DONKEY-ENGINES.

To all whom it may concern:

Be it known that I, ROBERT C. BRYANT, a citizen of the United States,and resident of Olatskanie, Columbia county, State of Orcgon, haveinvented a new and useful Improvement in F riction'Olutches for Drums ofDonkeydflngines, of which the following is a specification.

This invention relates to the friction clutch of the transmissionmechanism of a hoisting or donkey engine and has for its object toprovide screw actuated efficient means for setting up the drum againstthe wooden friction flange of the large gear on the driven. shaft, so asto cause the cone flange of the former to engage with the lat ter whenthe drum is to be rotated.

My invention also, particularly, has for its purpose to so construct thedevices by which the drum is moved into engagement with the large gearthat the former will be held in such engagement by automatic lookingdevices until manually released, so as to avoid the necessity of theoperator holding the drum in operative contact with said gear.

My invention further includes the particular features hereinafter fullyset forth.

In the drawings: Figure 1 is a plan section showing the driven shaft ofthe donkey engine and the large gear wheel rigidly mounted thereon andrevolving therewith, the drum, and the mechanism invented by me wherebythe latter is set against the wooden friction flange on the large gearand is locked in place when so set up; this view also shows themechanism provided for releasing the drum; Fig. 2 is a vertical,longitudinal sectional detail, on a larger scale, of the devicesprovided by me for setting up the drum against the friction flange ofthe large gear; also for locking in place, and releasing it again; Fig.3 is a diagrammatic top view of a part of the devices included in Fig.2and agreeing in scale with the latter. illustrates diagrammatically theposition of the parts prior to their operation for moving the drum intooperative contact with the friction flange on the large gear of theengine; Fig. t shows a part of the devices shown in the preceding figureand illustrates diagrammatically the position of the devices when mydevice has been operated to throw the drum into operative contact withsaid friction flange of the large gear; Figs. 5 and. 6 are details ofconstruction more fully clescribed in the body of the specification;Fig.

Specification of Letters Patent.

Application filed September 20, 1911.

This figure Patented May 12, 1914.

Serial No. 650,480.

7 is a perspective front view of that portion of my mechanism embodyingthe means for locking the drum in operative contact with the frictionflange of the large gear; Fig. 8 is a longitudinal section of the samemechanlsm; Fig. 9 is a front view of the head of the box, in which suchmechanism is contained, and Fig. 10 is a section on line y-y of Fig. 9.

The donkey engine is assumed to be of the common and well known type.For this reason I show only the driven shaft thereof in Fig. 1,designated by a. On the shaft is rigidly mounted a large gear wheel, 6,provided on one face with a laterally projecting wooden annular frictionflange, c. On the engine shaft, (0, is loosely mounted a drum, (Z, thehead, a, of which is provided with an annular cone flange, f, in whichto receive the friction flange, 0, of the gear wheel, 6, when the drumis to be operatively locked with the latter. The shaft, a, is providedwith a slot, g, in which is inserted a. bar, it, bearing against awasher, 7t, seated in the hub of the drum; the bar, It, being held inplace by split-keys inserted in the holes t, 2'. The shaft end, a, isprovided with a center bore, in which is contained a loose pin, 7'. Onthe shaft end, a, is threaded a box, 70, the details of construction ofwhich are readily seen by having reference to Figs. 2,

7 and 8. In the box, 70, is contained a disk, Z,

and in the head, m, of the box 70, are journaled knuckles, n, 0, adetail of one of which is shown in Fig. 5. The head, m, is made withcavities m m for the knuckles; it is also made with a neck, m, providedwith a center bore in which is contained a loose pin, 79. connected inany convenient manner with one end of the screw, q; the neck is alsoformed with a cavity, m", for the cross-head, a, mounted on the pin, 79.

As shown in the drawings, the screw end, (1, is formed with a socket andan annular groove at in which is placed a ring, seated in the peripheralgroove, 79', of the pin, 79, whereby the screw, q, is adapted to berotated on the pin, 72. The latter is made at its right end, as shown inthe drawings with an integral collar, 9, and a movable collar. 1-.Between the collars, r, r, is a cross-head, s, a detail of which isshown in Fig. 6. The cross-head is formed with recesses, s 8. See Figs.3 and 8. The knuckles, a, 0, journaled in the head m, are respectivelyprovided with hooks, n, 0',

adapted to enter in the recesses, s, of the cross-head, s, when theknuckles, n, 0, have been thrown into their locking position, as shownin Fig. 4; and the turning of the screw, q, in the reverse directionwill retract the pin, 79, turn the knuckles, a, 0, on their axles andmove them from their locking position as shown in the Fig. l, into theirreleased position, as shown in Fig. 3. The screw, 9, is journaled in abearing, a, formed with flanges, t, which provide an abutment for thehead, m, of the box, is, the latter being rotatably held in place by thecollar, u, screwed on the threaded end of the neck, m, or" the head, m.Parts illustrated in the drawings but not specifically described areunderstood to be of any convenient construction.

Between the integral collar, 1", of the pin,

79, and the cross-head, s, is placed an expansion spring, 12, thefunction of which will be described later. On the screw, is fastened acrank handle, 10. Between the hub of the large gear 6, and the oppositehub of the drum, (Z, is placed the usual expansion spring, 90. Theshell, 76, of the box, 72, is fastened in place on the head, m, byscrews, 2.

The operation of my device is as follows: Normally, the spring, 00,forces the drum, d, out of engagement with the friction flange, 0, 01"the gear, 7). By operating the handle, w, so as to drive in the screw,the pin, 79, is moved into contact with the disk, Z, and the latter isthereby brought to bear against the pin, 7', which bears against thebar, 7L, bearing against washer, h, and the hub of the drum; and thusthe inward movement of the screw, 9, forces the drum, (Z, intoengagement with the friction flange, c, "of the gear, 1). During suchmovement of the operative parts the shoulder, r, on the pin, 70, causesthe knuckles, 'n, 0, to be moved into their locking position, and whenfully moved into such position the spring, 41, operates to push thecross-head, 8, against the collar, 1, whereby the cross-head is placedin the position shown in Fig. it and serves to block the knuckles, n, 0.against return movement, and thus rigidly holds the drum, cl, inengagement with the friction flange of the gear wheel, b, without anyfurther attention being required upon the part of the operator. Torelease the drum, (Z, the operator turns the handle, to, in the reversedirection, thereby retracting the pin, 79, and causing the collar, r, to.pull the cross-head, a, from between the knuckles, a, 0, and causingthe latter to follow the movement of the cross-head, because theirhooks, a 0', are engaged with the recessed portions, '8 s, of thecross-head, s, as shown in Fig. 4, finally restoring the parts to theposition diagrammatically illustrated in Fig. 3, The ears (3, shown inFig. 1. on the bearing .26, are provided as means for fastening saidbearing to any convenient support.

I claim 1. In a hoisting engine of the type described, the combinationof a pivoted member; means including a manually operated power forturning said pivoted member on its axis; means between such pivotedmember and the drum of the engine adapted to move and hold the drum inoperating position by said pivoted member; and spring-actuated means forlocking the pivoted member in place, thereby holding the drum inoperating position, such means being included in said means for rotatingthe pivoted member.

2. In a hoisting engine of the type described, the combination of twopivoted members; means between such pivoted members and the drum of theengine adapted to move and hold the drum in operating posi tion by saidpivoted members; manually operable means comprising a movable blockadapted to engage and rotate said pivoted members and to be projectedtherebetween in its extreme position; and automatic means for projectingsaid block between pivoted members, whereby the latter are lockedagainst reverse rotation until the retraction of said block.

8. In a hoisting engine of the type described, the combination of twopivoted members; means between such pivoted members and the drum of theengine adapted to move and hold the drum in operating position by saidpivoted members; screw actuated means comprising a movable block adaptedto engage and rotate said pivoted members and to be projectedtherebetween 1n 1ts extreme posltion'; and automatic means for proecting said block between the pivoted members, whereby the latter arelocked against reverse rotation until the retraction of said block. I

4. In a hoisting engine of the type described, the combination of twopivoted members; means between such pivoted members and the drum of theengine, adapted to move and hold the drum in operating position by saidpivoted members; manually operable means comprising a movable block,adapted to engage and rotate said pivoted members and to be projectedtherebetween in its extreme position; and a spring adapted to projectsaid block past the axial centers of the pivoted members when the latterhave been placed in their extreme positions, thereby locking the pivotedmembers against reverse rotation until the retraction of said block. 7 o

5. In a hoisting engine of the type described, the combination of ashaft made with an inner end extension; a longitudinally movable membersupported by sueh inner end extension, the outer end or" saidlongitudinal member bearing against the drum of the engine; a box onsuch innerend extension of the shaft; a disk in such box bearing againstthe inner end of said longitudinal movable member; a longitudinallymovable pin bearing against the 0pposite face of the disk; a pair ofknuckles, journaled in the box, ositioned to be projected against saiddisk; adapted for longitudinally moving the said longitudinally movablemember; a cross-head longitudinally movable on the extremity of the pin;an abutment on the pin limiting the outward movement of the cross-head,a second abutment on the pin on the opposite side of the cross-head, acoil spring between said second abutment and the cross-head; saidcross-head operating to rotate the knuckles outward; said spring beingadapted to project the cross-head between the knuckles when the latterhave been turned outward to such degree as to permit the cross-head topass their axial centers, whereby the knuckles are locked againstreverse rotation; and means for causing the knuckles to be reverselyrotated by the retraction of the cross-head, the parts being arranged tocause the retract-ion of the latter before the knuckles are rotated.

6. In a hoisting engine of the type described, the combination of ashaft made with an inner end extension; a longitudinally movable membersupported by such inner end extension, the outer end of saidlongitudinal member bearing against the drum of the engine; a box onsuch innerend extension of the shaft; a disk in such box bearing againstthe inner end of said longitudinal movable member; a longitudinallymovable pin bearing against the opposite face of the disk; a pair ofknuckles, journaled in the box, positioned to be pro jected against saiddisk; a screw element adapted for longitudinally moving the pin; across-head longitudinally movable on the extremity of the pin; anabutment on the pin limiting the outward movement of the cross-head, asecond abutment on the pin on the opposite side of the cross-head, acoil spring between said second abutment and the cross-head; saidcross-head operating to rotate the knuckles outward; said spring beingadapted to project the cross-head between the knuckles when the latterhave been turned outward to such degree as to permit the cross-head topass their axial centers, whereby the knuckles are locked againstreverse rotation; and means for causing the knuckles to be re'versclyrotated by the retraction of the crosshead, the parts being arranged tocause the retraction of the latter before the knuckles are rotated.

, ROBERT C. BRYANT. Witnesses:

T. J. GEIsLnR, W. Lnwrs Coor.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

